Actions taken to defend against unauthorized activity within computer networks. CND includes monitoring, detection, analysis (such as trend and pattern analysis), and response and restoration activities. Note: Within DoD, term was approved for deletion from JP 1-02 (DoD Dictionary) by issuance of JP 3-13, "Information Operations". This term has been replaced by the use of 3-12, "Cyberspace Operations." Original source of term "cyberspace defense" used in JP was JP 1-02 (DoD Dictionary).
What does CND mean?
The term Computer Network Defense (CND) refers to actions taken to defend computer networks against unauthorized activity, including monitoring, detection, analysis, response, and restoration. It gives election, security, legal, or technical readers a specific label for the concept rather than a broader everyday meaning.
How is computer network defense (CND) used in cybersecurity?
In practice, Computer Network Defense (CND) is applied to the technical or security purpose captured by its definition: actions taken to defend computer networks against unauthorized activity. Organizations combine that function with documented procedures, authorized access, testing, monitoring, and controls appropriate to the system. The governing standard or security policy determines the exact implementation.
Why does computer network defense (CND) matter for election security?
Understanding Computer Network Defense (CND) matters because the concept can affect security, reliability, auditability, or trusted operation. In this glossary context, it refers to actions taken to defend computer networks against unauthorized activity. Applying the term precisely helps teams choose controls that match the actual technical function instead of assuming a broader or unrelated meaning.
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Actions taken to defend against unauthorized activity within computer networks. CND includes monitoring, detection, analysis (such as trend and pattern analysis), and response and restoration activities. Note: Within DoD, term was approved for deletion from JP 1-02 (DoD Dictionary) by issuance of JP 3-13, "Information Operations". This term has been replaced by the use of 3-12, "Cyberspace Operations." Original source of term "cyberspace defense" used in JP was JP 1-02 (DoD Dictionary).
Cite this term
Election Security Glossary. (2026). Computer Network Defense (cnd). In Election Security Glossary. Retrieved August 22, 2026, from https://electionsecurityglossary.com/glossary/computer-network-defense-cnd
Sources
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High consensus
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Multi-source
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Multi-source
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